nshell/src/ui.c

#include "ui.h"

#include <printf.h>
#include <string.h>

#include <gint/display.h>
#include <gint/kmalloc.h>
#include <gint/mmu.h>
#include <gint/rtc.h>

#include "term.h"
#include "utf8.h"

static void date_str(char *buf) {
    rtc_time_t t;
    rtc_get_time(&t);

    sprintf(buf, "%04d-%02d-%02d %02d:%02d:%02d", t.year, t.month, t.month_day, t.hours, t.minutes, t.seconds);
}

static void str_pad(char *buf, const char *prefix, const char *suffix, int wanted_len) {
    const size_t l1 = strlen(prefix);
    const size_t l2 = strlen(suffix);

    const size_t toadd = wanted_len - (strlen_utf8(prefix) + strlen_utf8(suffix));

    for (size_t i = 0; i < l1; i++) {
        buf[i] = prefix[i];
    }

    for (size_t i = 0; i < toadd; i++) {
        buf[l1 + i] = ' ';
    }

    for (size_t i = 0; i < l2; i++) {
        buf[l1 + toadd + i] = suffix[i];
    }

    buf[l1 + l2 + toadd] = '\0';
}

void set_statusbar(int tick_ctr, int shift_state, int alpha_state, int battery) {
    // set green bar
    for (int i = 0; i < UNS_TERM_COLS; i++)
        term_writeat(0, i, C_NONE, C_GREEN, " ");

    kmalloc_arena_t *uram_arena = kmalloc_get_arena("_uram");
    kmalloc_gint_stats_t *ram_stats = kmalloc_get_gint_stats(uram_arena);
    const int uram_percent = 100 * ram_stats->used_memory / mmu_uram_size();

    char *shift_symbol = shift_state ? "⇫" : " ";
    char *alpha_symbol = alpha_state ? (shift_state ? "A" : "a") : "1";

    char prefix[UNS_TERM_COLS + 1];
    sprintf(prefix, "%s%s t=%d bat=%.2fV uram=%d%%(%dk)", shift_symbol, alpha_symbol, tick_ctr, (float)battery / 100,
            uram_percent, ram_stats->used_memory / 1024);

    char now[32];
    date_str(now);

    char suffix[UNS_TERM_COLS + 1];
    sprintf(suffix, "%s", now);

    char statusbar[UNS_TERM_COLS + 1];
    str_pad(statusbar, prefix, suffix, UNS_TERM_COLS);

    term_writeat(0, 0, C_BLACK, C_GREEN, statusbar);
}

static void center_str(int len, char buf[len], const char *s) {
    const int l = strlen(s);
    const int before = len / 2 - l / 2;

    int i;
    for (i = 0; i < before; i++)
        buf[i] = ' ';

    for (int j = 0; j < l; j++)
        buf[i++] = s[j];

    for (; i < len; i++)
        buf[i] = ' ';
}

char fnkeys[6][11] = {"opt 1-", "opt 2--", "opt 3---", "opt 4----", "opt 5-----", "opt 6"};
void set_menubar(void) {
    int col = 0;
    for (int i = 0; i < 6; i++) {
        char buf[11] = "";
        center_str(10, buf, fnkeys[i]);
        buf[10] = '\0';

        term_writeat(UNS_TERM_ROWS - 1, col, C_WHITE, C_BLUE, buf);

        // print spacers
        if (i < 6 - 1)
            term_writeat(UNS_TERM_ROWS - 1, col + 10, C_WHITE, C_BLACK, " ");

        col += 10 + 1;
    }
}